How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Phil Your Own Question
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
23932409
Type Your HVAC Question Here...
Phil is online now
A new question is answered every 9 seconds

I have a GB142-30 83,000 BTU Output Wall Hung Modulating-Condensing

Customer Question

i have a GB142-30 83,000 BTU Output Wall Hung Modulating-Condensing Gas Boiler with a 3L default code. no hot water. please help.
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.
Hello,

Start on page 56 at the below link. Normally I would step you through it, but this will be faster for you

Service Manual
Customer: replied 1 year ago.
ive been through the manual flow sheet thx
Expert:  BillyHvac replied 1 year ago.
Great,,then share your results and we will move along..

120v present at motor?
Tacho plug ohmed with no shaorts?
When testing cable did you activate bc10?